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Northern Lights L773LW Engine

The Northern Lights L773LW is a 1.13 L 3-cylinder naturally aspirated engine rated at 1800 rpm. It powers generator sets from Northern Lights, including the M773L.

Also known as: Northern Lights L773LW

Part of the Northern Lights 773 engine family — 5 variants share parts & fitment.

1.13 L
Displacement
3
Cylinders
1800 rpm
Rated speed

Engine specifications

Displacement1.13 L
Cylinders3
Aspirationnaturally aspirated
Rated speed1800 rpm

Maintenance schedule

ItemSpecCapacityPart #Interval
Fuel filterlarge spin-on fuel filter24-52020100 hr Amazon eBay $24.71 NAPA $15.34
Oil filterfull flow, spin-on oil filter with bypass24-0200150 hr Amazon eBay $23.45 NAPA $9.09
Oilspin-on oil filter with bypass4.2 qt (ltr)—200 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

32
ItemActionHoursMonthsNotes
Aceite del motor y filtroChange50 hrFirst service — Período de adaptación; también a las 100 horas (PS2/PS3)
Ajustes de las válvulasAdjust50 hrFirst service — PS6; después de las primeras 50 horas
Nivel de electrolito de las bateríasCheck50 hr1 moPS18
Tensión de la correa trapezoidalInspect50 hrPS5
Aletas del radiadorClean100 hrPS16; sólo equipos industriales
V-belt tensionCheck100 hrSP6 per schedule summary; SP-5 text calls for daily check
battery electrolyte levelCheck100 hrSP17
Aceite del motorChange200 hrPS2; cada 100 horas o 6 semanas en tiempo frío, lo que llegue primero
Filtro del aireInspect200 hrPS4; más a menudo bajo condiciones de mucho polvo
Filtro primario del combustible (marca Racor)Change200 hrPS8; o cuando sea necesario
Filtro secundario del combustibleChange200 hrPS9
Filtros del aceite lubricanteChange200 hrPS3
air cleanerCheck200 hrSP4; check more often in dusty conditions
battery conditionCheck200 hrSP18 per schedule summary; battery care text gives hydrometer check every 500 hours
engine oil and filterChange200 hrFirst service — Every 200 hours (SP2/3); cold intermittent operation: every 100 hours or six weeks
exhaust elbowInspect500 hrSP16; sooner if needed; replace if rust or damage
primary fuel filter elementChange500 hrSP8; or as often as necessary
raw water pump impellerChange500 hrSP15; or as needed
secondary fuel filterChange500 hrSP9; or as necessary
Ajustes de las válvulasInspect600 hrPS6; cada 600 horas / anualmente
Condición de las baterías (hidrómetro)Test600 hrPS19
InyectoresInspect600 hrPS11
Rodete de la bomba del agua brutaChange600 hrPS17; sólo equipos marinos, o cuando sea necesario
Sistema refrigeranteClean600 hr12 moPS14; limpie con agua cada 600 horas o cada 12 meses, lo que llegue primero
air cleaner elementChange1000 hr24 moEvery 1000 hours or two years, whichever comes first
injectorsCheck1000 hrSP12; clean injection nozzles every 1500 hours
valve clearanceAdjust1000 hrSP6; after 1000 hours or as needed
Bomba de inyección del combustibleInspect2400 hrPS12
Cambiador de calorClean2400 hr12 moPS15; sólo equipos marinos
cooling systemOther2500 hr24 moSP11 check and flush; every 2500 hours or every 24 months, whichever comes first
fuel injection pumpCheck2500 hrSP13; settings, max speed, idle speed and exhaust smoke
heat exchangerClean2500 hr24 moSP14; every 24 months, or after 2500 hours, or as needed

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

26
TypeItemValueUnitCondition
ClearanceCoolant level below filler cap sealing surfaceabout 1 in. (2.5 cm)in. (cm)engine cold
ClearanceDeflexión de la correa trapezoidal3/16pulgada (5 mm)punto céntrico entre el cigüeñal y las poleas del alternador
ClearanceV-belt deflection at midpoint between crankshaft and alternator pulleys3/16 in. (5 mm)in. (mm)
GapValve clearance, intake and exhaust0.008 in. (0.2 mm)in. (mm)
PressureEngine oil pressure (Operating)above 15 PSIPSIgauges checked often while operating
PressureEngine oil pressure normal reading20-60 PSIPSIafter a few seconds of operation
PressureExpansion tank filler cap release pressure7 PSI (0.5 bar)PSI (bar)
PressurePresión del aceite (operación)arriba de 15PSI
PressurePresión del aceite normal20-60PSI
PressureVálvula de presión del tapón del refrigeranteaproximadamente 7PSI (0.5 bar)
ResistanceGlow plug resistance between terminal and engine blockunder 1 ohmohm
SpeedVelocidad del motor1200 ó 1800 (60 Hz) ó 1500 (50 Hz)RPM
TemperatureCoolant temperature gauge normal range167°F and 194°F (75°C to 90°C)°F (°C)operating
TemperatureHigh water temperature shutdown threshold205°F (96°C)°F (°C)marine units
TemperatureRestart temperature after overheatbelow 200°F (94°C)°F (°C)
TemperatureTemperatura de parada de emergenciaarriba de 205°F (96°C)
TemperatureTemperatura del agua (operación)bajo 200°F (94°C)
TorqueInjector43 or 50 ft/lbs (6 to 7 kgm)ft/lbs (kgm)
TorqueInjector return line retaining bolts22 - 30 ft/lbsft/lbs
TorqueInyector43 a 50libras por pie (6 a 7 kgm)
TorqueRocker arm cover nuts5 - 8 ft/lbs (0.8 - 2.3 kg/m)ft/lbs (kg/m)
TorqueTornillos de retención del tubo de retorno de combustible22 - 30libras por pie (3.0 - 4.1 kgm)
TorqueTuercas de la tapa del balancín5 - 8libras por pie (0.8 - 2.3 kg)
Valve clearanceHuelgo de válvulas de admisión y escape0.008pulgada (0.2 mm)motor frío y parado
VoltageDC voltmeter readingbetween 11 and 15 voltsvoltsat 80°F (25°C) ambient temperature
VoltageVoltímetro CC11 y 15voltiostemperatura ambiente de 80°F (25°C)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
Coolant50% water / 50% ethylene glycol antifreeze mixNot methyl alcohol based antifreeze; antifreeze with high silicate should not be used. Distilled or soft water preferred
CoolantMezcla 50% agua / 50% etilenglicol (anticongelante)Recomendado para todo el año
Engine oilSAE 5W sencilla / SAE 5-20W múltipleAPI Servicio CC/CD/CE (sencilla); API Servicio CC/CD/SF (múltiple)below -23°CBajo -10°F (-23°C); puede aumentar el consumo de aceite. Nunca agregue aditivos ni aceite limpiador.
Engine oilSAE 5W single viscosity / SAE 5-20W multi-viscosityAPI Service CC/CD/CE single viscosity; API Service CC/CD/CF multi-viscositybelow -23°CBelow -10°F (-23°C); some increase in oil consumption may be expected with SAE 5W and SAE 5-20W oils
Engine oilSAE 10W sencilla / SAE 10-30W múltipleAPI Servicio CC/CD/CE (sencilla); API Servicio CC/CD/SF (múltiple)-23°C to 0°C-10 a 32°F (-23 a 0°C)
Engine oilSAE 10W single viscosity / SAE 10-30W multi-viscosityAPI Service CC/CD/CE single viscosity; API Service CC/CD/CF multi-viscosity-23°C to 0°C-10 to 32°F (-23 to 0°C)
Engine oilSAE 30W sencilla / SAE 15-40W múltipleAPI Servicio CC/CD/CE (sencilla); API Servicio CC/CD/SF (múltiple)above 0°C4.0 litrosArriba de 32°F (0°C)
Engine oilSAE 30W single viscosity / SAE 15-40W multi-viscosityAPI Service CC/CD/CE single viscosity; API Service CC/CD/CF multi-viscosityabove 0°C4.9 litersAbove 32°F (0°C). Engine capacity with new oil filter: 4.75 quarts (4.9 liters) - M773LW3(G)
FuelDiesel grado No. 1ASTM D975below 0°CBajo el punto de congelación y en altitudes de más de 5.500 pies (1.500 m)
FuelGrade No. 2 diesel above freezing 32°F (0°C); Grade No. 1 below freezing and at altitudes above 5,500 ft. (1500 meters)ASTM designation D975; low or ultra low sulphur; cetane number minimum of 45Do not use domestic heating oils, Class B engine, Class D domestic fuels, Class E/F/G/H industrial or marine fuels, ASTM-D975-60T No. 4-D and higher
FuelDiesel grado No. 2 (ASTM D975)ASTM D975; número de cetano mínimo 45; menos del 1% de azufre (preferible menos del 0.5%)above 0°CArriba de 32°F (0°C)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

12
Ajuste de las válvulas adjustment

Tools: Juego de galgas

  1. Ajuste las válvulas después de las primeras 50 horas y cada 600 horas.
  2. El motor debe estar frío y parado.
  3. Gire el cigüeñal hasta que la válvula de admisión empiece a abrir y la de escape a cerrar.
  4. Gire el cigüeñal una vuelta completa más y ajuste ambas válvulas de ese cilindro.
  5. Afloje la tuerca de retención y ajuste el huelgo con el tornillo de ajuste.
  6. Repita los pasos para cada cilindro.
  7. Vuelva a poner la tapa del balancín y apriete las tuercas.
Valve Clearance Adjustment adjustment

Tools: feeler gauge, wrench

  1. Remove the rocker arm cover.
  2. Bring No. 1 cylinder to top dead center on compression: align crank pulley top mark with timing gear case mark.
  3. Loosen the lock nut and adjust clearance between rocker arm and valve guide for intake and exhaust to 0.008 in. (0.2 mm).
  4. Repeat for each cylinder; each set of valves must be adjusted individually.
  5. Replace rocker arm cover and tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m).
Verificación de las bujías de calentamiento diagnostic

Tools: Bombilla de prueba CC

  1. Afloje el cable portador de corriente entre el polo positivo de la batería y el polo positivo de la bujía.
  2. Conecte una bombilla de prueba CC entre el polo positivo de la batería y el polo positivo de la bujía.
  3. Si la bombilla se prende, la bujía funciona apropiadamente.
  4. Verifique todas las bujías y cambie las defectuosas.
Bleeding the Fuel System maintenance

⚠ Escaping diesel fuel under pressure can penetrate skin; relieve pressure before disconnecting lines.

Tools: wrench, cardboard

  1. Loosen bleed bolt A on top of the filter.
  2. Pump hand primer B on the fuel lift pump until pure fuel without bubbles escapes; tighten bleed screw A.
  3. Loosen bleed screw C, pump hand primer until pure fuel escapes, then tighten.
  4. If the engine will not start, loosen a fuel line at the injector and crank until pure fuel escapes, then tighten.
  5. After the engine starts, use a piece of cardboard to look for fuel leaks.
Cambio del aceite del motor maintenance

⚠ Nunca utilice ningún aceite limpiador.

⚠ Tire el aceite de desperdicio de manera apropiada.

  1. Cambie el aceite y el filtro después de las primeras 50 horas.
  2. Use aceite de Servicio CC de peso 30 durante las primeras 100 horas.
  3. Cambie el aceite y el filtro de nuevo a las 100 horas; después cada 200 horas.
  4. Quite el tapón del tubo de drenaje y vacíe el aceite; vuelva a poner el tapón y el tubo.
  5. Cambie el aceite cuando el motor esté cálido.
  6. Vuelva a llenar el motor con el aceite recomendado.
Cambio del filtro del aceite maintenance

⚠ El apretar demasiado puede causar daño en la caja del filtro.

Tools: Llave de filtro

  1. Cambie el filtro cada 200 horas.
  2. Quite el filtro gastado con una llave de filtro y tirelo apropiadamente.
  3. Asegúrese de quitar y tirar el empaque gastado; limpie la superficie de la base.
  4. Extienda una capa delgada de aceite en el empaque de goma del filtro nuevo.
  5. Enrósquelo hasta que el empaque toque la superficie selladora; apriete media vuelta más sólo con las manos.
  6. Arranque el motor, verifique que no haya pérdidas, pare y verifique el nivel.
Cambio del rodete de la bomba del agua bruta maintenance

⚠ Ponga material protector debajo de los desarmadores para no dañar la caja de la bomba.

⚠ Mantenga a bordo un rodete y una junta de cubierta de reserva.

Tools: Alicates puntiagudos, Dos desarmadores

  1. Cambie el rodete cada 600 horas o como sea necesario.
  2. Quite la cubierta del extremo de la bomba.
  3. Quite el rodete con alicates puntiagudos o dos desarmadores; quite todos los pedazos.
  4. Limpie la parte interior de la caja.
  5. Presione adentro el rodete nuevo y ponga la arandela selladora.
  6. Vuelva a poner la cubierta utilizando una junta nueva.
Changing Lube Oil Filter maintenance

⚠ Overtightening can damage the filter element.

Tools: filter wrench

  1. Use a filter wrench to remove the old filter and dispose of it properly.
  2. Make sure the old gasket is removed and discarded; clean the mounting surface.
  3. Spread a thin film of engine oil on the new filter's rubber gasket.
  4. Screw the filter on the nipple until the gasket meets the sealing surface.
  5. Using hands only, tighten one-half turn farther.
  6. Fill engine with oil, start and check for leaks; stop, wait 3 minutes and check level.
Cooling System Flushing maintenance

⚠ Close the sea-cock before working on the engine cooling system.

⚠ Do not open the filler cap when the engine is warm.

  1. Remove expansion tank cap and drain the engine block.
  2. Open block drain cock and remove the plug in the lower left side of the heat exchanger tank.
  3. Pour clean water into the expansion tank until water from the drains is free of discoloration and sediment.
  4. Let water drain completely, close drains and refill with recommended mixture.
  5. Check hoses and connections and repair any leakage.
Correas trapezoidales maintenance
  1. Verifique la tensión y el desgaste de la correa después de cada 50 horas.
  2. Presione con el pulgar en el punto céntrico entre el cigüeñal y las poleas del alternador.
  3. La tensión está correcta si la correa puede ser presionada 3/16 de pulgada (5 mm).
Heat Exchanger Cleaning maintenance

Tools: metal rod

  1. Drain expansion tank and heat exchanger.
  2. Remove heat exchanger end covers and remove the core.
  3. Clean the inside of the core tubes using a metal rod; flush, inspect and clean again if necessary.
  4. Reassemble, fill the cooling system, start the engine and check for leaks.
Oil Change maintenance

⚠ Never put additives or flushing oil in crankcase.

⚠ Dispose of waste oil in an approved manner.

  1. Change oil when engine is warm.
  2. Loosen the clamp on the oil change tube and remove the cap; drain oil.
  3. Replace the cap and tube.
  4. Refill engine with recommended oil; capacity with new filter is 4.9 liters (4.75 quarts).

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Parts cataloged across the Northern Lights 773 family

300
Part #DescriptionCategory
24-28602Air Filter ElementAir filter
RE529956BreathingAir filter
185046210Alternator AssemblyAlternator
185046220Alternator 12 Volt, 40 AmpAlternator
185446234Regulator AssemblyAvr
00-08601Belt GuardBelt
40-08601Drive BeltBelt
185416490Brush AssemblyBrush
185416500Brush Holder AssemblyBrush
185426231BrushBrush
130306190Fuel Filter AssemblyFuel filter
24-52020Fuel FilterFuel filter
052109099GasketGasket
052109101GasketGasket
11-08601Gasket, ExhaustGasket
11-12005Oil Fill Neck GasketGasket
11-18602Gasket, Thermostat CoverGasket
11-31902GasketGasket
110996800GasketGasket
111147560Head Gasket; t = 1.2Gasket
111147570Head Gasket; t = 1.3Gasket
111996420Gasket, Rocker Arm CoverGasket
120996150Gasket, Rocker Arm BracketGasket
130326051GasketGasket
130516069GasketGasket
130516089GasketGasket
130996130GasketGasket
131426200GasketGasket
131426210GasketGasket
135996750Gasket, Air IntakeGasket
135996930GasketGasket
135996940GasketGasket
140546020Filter JointGasket
140996260GasketGasket
140996270Gasket, Valve AssemblyGasket
145996830GasketGasket
16-08601O-ringGasket
165996520Gasket, Front PlateGasket
165996530GasketGasket
198996060GasketGasket
29-08600Gasket KitGasket
29-08601Gasket Kit (includes all keys)Gasket
314990030Gasket, ElbowGasket
340990011Gasket, Gear Case CoverGasket
185366220Glow Plug, 12 VoltGlow plug
185376370Connector, Glow Plugs (former Harness part # 184606360)Glow plug
068115200TubeHose
10-28603Cover, Lower Air Intake with 1-3/8" Hose BarbHose
140986830Oil Hose (Marine)Hose
18-18601Coolant Pump Inlet HoseHose
18-18602Hose 5/16" ID x 28" PolyvinylHose
18-18603Hose, Coolant By-passHose
18-18604Hose, Coolant Pump InletHose
18-18605Hose, Expansion Tank OutletHose
18-28201Hose 1-5/8" ID x 1-3/4" 3 Ply SiliconeHose
18-28601Hose, Air IntakeHose
18-72004Oil Drain HoseHose
19-00012Hose Clamp #12Hose
19-00016Hose Clamp #16Hose
19-00020Hose Clamp #20Hose
19-00040Hose Clamp #40Hose
19-00048Hose Clamp #48Hose
19-18602Hose ClampHose
21-13102Union 3/4" Hose BarbHose
27-18601Tube 5/16" ID x 23" PolyurethaneHose
41-00004Hose 3/4" ID x 18-1/2"Hose
41-01011Hose 1/4" ID Push-onHose
49-00012Hose Clamp #12Hose
25-11216ImpellerImpeller
25-12009Impeller (includes key #15)Impeller
25-12060ImpellerImpeller
131406340Injector AssemblyInjector
131406470InjectorInjector
131416150NozzleInjector
24-02001Oil FilterOil filter
24-02002Oil FilterOil filter
00-00013Label "12 Volt"Service part / kit
00-00014Label "24 Volt"Service part / kit
00-08301"Northern Lights" DecalService part / kit
00-13101SpringService part / kit
00-40013Plate, S-1 Control PanelService part / kit
00-40028GrommetService part / kit
010109235BoltService part / kit
010109238PlugService part / kit
010109264BoltService part / kit
010109340BoltService part / kit
010110610BoltService part / kit
010110625BoltService part / kit
010110630BoltService part / kit
010310860BoltService part / kit
010311020BoltService part / kit
010311045BoltService part / kit
010700610BoltService part / kit
010700820BoltService part / kit
010700835BoltService part / kit
010810840BoltService part / kit
010810845BoltService part / kit
011100408BoltService part / kit
011301025BoltService part / kit
011310612BoltService part / kit
011310614BoltService part / kit
011310620BoltService part / kit
011310625BoltService part / kit
011310635BoltService part / kit
011310640BoltService part / kit
011310660BoltService part / kit
011310680BoltService part / kit
011510640BoltService part / kit
011510840BoltService part / kit
011510865BoltService part / kit
012100620StudService part / kit
012100635Stud M6 x 1.0 x 35 mmService part / kit
012100820StudService part / kit
012109177StudService part / kit
012110620Stud M6 x 1.0 x 20 mmService part / kit
012110635StudService part / kit
012110660StudService part / kit
015100412ScrewService part / kit
015140408ScrewService part / kit
015140425ScrewService part / kit
020109075CON ROD NUTService part / kit
020109076NutService part / kit
020210010NutService part / kit
020700008NutService part / kit
020800018NutService part / kit
020900010NutService part / kit
023100004NutService part / kit
023100006NutService part / kit
023100008NutService part / kit
024600008Cap NutService part / kit
026100010WasherService part / kit
026200008WasherService part / kit
026200010WasherService part / kit
027100008Spring WasherService part / kit
027100010Spring washerService part / kit
030300414Spring PinService part / kit
030300816Spring PinService part / kit
030309005Spring PinService part / kit
030500512Dowel PinService part / kit
030500612Dowel PinService part / kit
030500616Dowel PinService part / kit
030501025Dowel PinService part / kit
030509020Dowel PinService part / kit
031100004Snap PinService part / kit
034100508KeyService part / kit
036500021Snap RingService part / kit
036509005Snap RingService part / kit
036800005Snap RingService part / kit
036800006Snap RingService part / kit
036800008Snap RingService part / kit
036800010Snap RingService part / kit
040106203BearingService part / kit
040109059BearingService part / kit
040126210BearingService part / kit
040306203BearingService part / kit
042303015BearingService part / kit
048100010Steel BallService part / kit
064100045Expansion PlugService part / kit
064210015Expansion Plug, 15 mmService part / kit
064210018Expansion Plug, 18 mmService part / kit
064210025Expansion Plug, 25 mmService part / kit
064210030Expansion Plug, 30 mmService part / kit
064210035Expansion Plug, 35 mmService part / kit
064210040Expansion Plug, 40 mmService part / kit
064510020PlugService part / kit
10-08601Exhaust Manifold/ Expansion TankService part / kit
10-28601Air intake ManifoldService part / kit
10-28602CoverService part / kit
10-51099Fuel Manifold 1/4 NPTService part / kit
110101520Cylinder Block Assembly - (includes keys #2- 21)Service part / kit
110103541Cylinder Block Assembly (includes keys #2 - #21, formerly #110103540)Service part / kit
110136280Valve SeatService part / kit
110136300Valve SeatService part / kit
110156400Bearing Holder Assembly (includes keys #6 & #7)Service part / kit
110156410Bearing Holder Assembly (includes keys #6 & #7)Service part / kit
110156420Bearing Holder Assembly (includes keys #6 & #7)Service part / kit
110446421Flywheel HousingService part / kit
110566080Breather ValveService part / kit
110666050RetainerService part / kit
110666060Vent FilterService part / kit
110701110Oil PanService part / kit
110708620Oil PanService part / kit
110756490Dipstick TubeService part / kit
110766200HolderService part / kit
111010290Cylinder Head Assembly (Includes keys #1 - #14)Service part / kit
111136440Head BoltService part / kit
111136450Head BoltService part / kit
111217470Rocker Arm Cover Assembly (includes keys #3 - #5)Service part / kit
115017450Piston Kit; O.S. 0.50Service part / kit
115017460Piston Kit; S.T.D.Service part / kit
115026340Connecting Rod Assembly (includes keys #20 - #22)Service part / kit
115107430Ring Kit; O.S. 0.50 mmService part / kit
115107900Ring Kit; S.T.D.Service part / kit
115176150Connecting Rod BoltService part / kit
115256830Crankshaft Assembly (includes keys #2 - 4 & #24)Service part / kit
115276180Crankshaft GearService part / kit
115326231Piston PinService part / kit
115326234Piston PinService part / kit
115356720Flywheel Assembly (includes key #28)Service part / kit
115376130Ring GearService part / kit
115396650Crankshaft PulleyService part / kit
12-00030Capscrew, Hex Head, M6 x 1.0 x 16 mmService part / kit
12-00031Capscrew, Hex Head M6 x 1.0 x 25 mmService part / kit
12-00093Machine Screw, Round Head Philips #6 - 32 x 1/2"Service part / kit
12-00094Machine Screw #10-32 x 3/8" Stainless SteelService part / kit
12-00311Capscrew, Hex Head 3/8-16 x 3/4"Service part / kit
12-00313Capscrew, Hex Head 3/8-16 x 1-1/4"Service part / kit
12-00753Capscrew, Hex Head M8 x 1.25 x 30 mmService part / kit
12-00776M8 x 20 18-8, S/S hex head capscrewService part / kit
12-00943Capscrew, Hex Head M12 x 1.25 x 30 mmService part / kit
12-01102Capscrew, Hex Head M6 x 1.0 x 16 mm S/SService part / kit
12-01124Capscrew, Hex Head M6 x 1.0 x 50 mmService part / kit
12-01125Capscrew, Hex Head M6 x 1.0 x 65 mmService part / kit
12-01131Capscrew, Hex Head M6 x 1.0 x 20 mmService part / kit
12-01132Capscrew, Hex Head M6 x 1.0 x 85 mmService part / kit
12-09130Capscrew, Hex Head M6 x 1.0 x 95 mm S/SService part / kit
12-09136Capscrew, Hex Head M6 x 1.0 x 90 mm S/SService part / kit
12-09712Capscrew, Hex Head M8 x 1.25 x 25 mm S/SService part / kit
12-09814Capscrew, Hex Head M10 x 1.5 x 35 mm S/SService part / kit
12-09956Capscrew, Hex Head M12 x 1.75 x 65 mm, S/SService part / kit
12-90049Capscrew, Hex Head M6 x 1.0 x 15 mmService part / kit
120016021Cam Gear AssemblyService part / kit
120026570Cam Shaft AssemblyService part / kit
1200311Capscrew, Hex Head 3/8-16 x 3/4"Service part / kit
120036880Rocker Arm Assembly (includes keys #1-10)Service part / kit
120116160TappetService part / kit
120166360Intake ValveService part / kit
120176250Exhaust ValveService part / kit
120186080RetainerService part / kit
120216040VALVE SPRING CAP (A)Service part / kit
120226070CotterService part / kit
120316300Rocker Arm ShaftService part / kit
120356200Intake Rocker ArmService part / kit
120356210Exhaust Rocker ArmService part / kit
120456222Push RodService part / kit
120736081GearService part / kit
125046260Governor Lever AssemblyService part / kit
125116131ShaftService part / kit
125156170ArmService part / kit
125156180ArmService part / kit
125176180Stop Lever (formerly #125176080)Service part / kit
125256120SliderService part / kit
125406071Tension LeverService part / kit
125416020Governor LeverService part / kit
125976120BracketService part / kit
13-09710Stud M8 x 1.25 x 25 mm (35 mm LOA S/S)Service part / kit
13-80070Stud, M10 x 1.5 x 110.8 mmService part / kit
13-91132Stud, M6 x 1.0 x 111.4 mmService part / kit
130396030PlugService part / kit
130436011Banjo BoltService part / kit
130516080HousingService part / kit
130516081SpringService part / kit
130516082PistonService part / kit
130516083SpringService part / kit
130516084DiaphragmService part / kit
130516085PinService part / kit
130516086LeverService part / kit
130516087SpringService part / kit
130516090CapService part / kit
130516091ScrewService part / kit
130516092Joint BoltService part / kit
130556681PipeService part / kit
130556920PipeService part / kit
130556931PipeService part / kit
131236190BoltService part / kit
131236280ScrewService part / kit
131426300Shim SetService part / kit
131446066SpringService part / kit
131446068SpacerService part / kit
131446069NutService part / kit
131446070Spring seatService part / kit
131507740Injection Line #1Service part / kit
131507750Injection Line #2Service part / kit
131507760Injection Line #3Service part / kit
131606880Return LineService part / kit
131976270Bracket, Filter Support & Lifting Eye (can use 23-08601)Service part / kit
135597640SpacerService part / kit
14-00001Hex Nut, #10-32Service part / kit
14-00015Hex Nut #6 - 32, Stainless SteelService part / kit
14-00817Hex Nut M10 x 1.5 mm S/SService part / kit
14-01132Hex Nut M6 x 1.0 S/SService part / kit
14-04401Hex Nut, M5 x 0.8Service part / kit
14-09711Hex Nut, M8 x 1.25 S/SService part / kit
14-09830Hex Nut, Nylock M12 x 1.75, S/SService part / kit
140036141Valve AssemblyService part / kit
140036220Relief Valve AssemblyService part / kit
140166130RotorService part / kit
140406500Pick-upService part / kit
140607270Oil LineService part / kit
140976080BracketService part / kit
1410-08601Exhaust Manifold/ Expansion TankService part / kit
1412-00030Capscrew, Hex Head, M6 x 1.0 x 16 mmService part / kit
1412-00031Capscrew, Hex Head M6 x 1.0 x 25 mmService part / kit
1412-01132Capscrew, Hex Head M6 x 1.0 x 85 mmService part / kit
1412-09714Capscrew, Hex Head M8 x 1.25 x 40 mm S/SService part / kit
1412-09956Capscrew, Hex Head M12 x 1.75 x 65 mm S/SService part / kit
1414-00711Hex Nut, M8 x 1.25Service part / kit
1415-00702Lock Washer M8Service part / kit
145336490PulleyService part / kit
145386520SpacerService part / kit

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

What is the displacement of the Northern Lights L773LW?

The Northern Lights L773LW has a displacement of 1.13 liters with 3 cylinders.

Which generators use the Northern Lights L773LW engine?

The Northern Lights L773LW powers 1 generator set(s), including Northern Lights M773L.

How often should you change the oil in the Northern Lights L773LW?

The Northern Lights L773LW oil change interval is every 200 hours.